<template>
  <div class="container">
    <h1 class="outline" v-text="outlineText"></h1>
    <div class="clearfix">
      <!-- 父子 -->
      <div class="parent-box">
        <h3>父组件的冰山一角</h3>
        <div class="mb20" v-text="vals"></div>
        <input type="button" @click="parentEnvet" value="父组件触发" />
        <childA>
        </childA>
      </div>
      <div class="children-box">
        <c-b :sonMsg="msg" @showMsg="msgFromChild" ref="childcomp">
        </c-b>
        <child-b></child-b>
      </div>
    </div>
  </div>
</template>

<script>
  import childA from './childrenA.vue';
  import childB from './childrenB.vue';
  import childC from './childrenC.vue';
  // import Bus from '../util/bus.js';

  export default {
    components: {
      childA,
      childB,
      "c-b": childC
    },
    data() {
      return {
        outlineText: '实例中的事件和方法',
        vals: '我会展示C组件传给我的数据',
        msg: '我是父组件的数据1111',
      }
    },
    methods: {
      msgFromChild(data) {
        this.vals = data;
      },
      parentEnvet() {
        this.$refs.childcomp.childFn();
        //this.$refs['childcomp'].childFn();
      },
    }
  }

</script>

<style scope>
  .outline {
    width: 40%;
    margin: 20px auto;
    padding-bottom: 30px;
    border-bottom: 1px solid #999;
  }

  .container {
    width: 70%;
    margin: 0 auto;
    text-align: center;
  }

  .clearfix:after {
    content: '';
    display: block;
    clear: both;
  }

  .parent-box {
    float: left;
    width: 50%;
    height: 200px;
    background-color: #fbe1f5;
  }

  .children-box {
    float: left;
    width: 50%;
    height: 200px;
    background-color: #dcf3fd;
  }

  .mb20 {
    margin-bottom: 20px;
  }

  .message-container {
    position: relative;
    top: 45px;
    min-height: 200px;
    line-height: 30px;
    margin-bottom: 100px;
    box-sizing: border-box;
  }

</style>
